I have been looking to make an underwater DPV (diver propulsion vehicle). The
power switch you see on the store models is enclosed within the airtight handle.
You wear a velcro bracelet with a magnet stitched into it, and when you put your
hand on the handle, the magnet closes the switch inside, this then gives the
unit
power. Has anyone ever heard of these, or better yet, knows a source??
Brad (back from drift diving and feelin' even more lazy!)
WFO Herb wrote:
> ....moves the internal magnet closer to the surface when you twist the knob.
>
> Mjsprite@aol.com wrote:
>
> > Hey everyone,
> > I bought a magnetic stand for my dial indicator to use while blueprinting a
> > 1380 engine. For the life of me, I can't figure out how this magnet works. A
> > simple turn of the switch creates a very powerful magnet in the base. Turn
> > the switch back and there's no attraction whatsoever. No batteries or
> > electricity. This really intrigues me. Can anyone explain how this works?
> > Mike
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